On the dusty streets of the castle town Dayah in the Fortna Kingdom, a young orphan named Nina steals for survival. Experiencing one tragedy after another, she has little to hope for in her life. Believing it best for Nina, her closest friend, Saji, hands her over to Second Prince Azure Seth Fortna, who has been searching for someone with unique and intense deep-blue eyes—just like Nina's. The kingdom's princess, the revered Astral Priestess Alisha, has recently died on her way to the Galgada Kingdom, where she was to marry the tyrant First Prince Sett. However, her death is concealed for political reasons, and that is where Nina needs to step in. With nowhere else to go and no one to turn to, Nina assumes Alisha's identity and future duties. But with each moment spent with Azure, Nina feels herself drawn to his warmth, fearing that once she is wed to another, nobody will remain to remember her true self.

Shun Tokinoya is a second-year high school student who lives with his mother and younger sister. After his father was killed in an accident and his sister was injured, he quit the game he loved and now works at an esports café called "FOX ONE." He spends all of his time studying and working part-time, while also socializing with his childhood gaming buddies. Suddenly, he discovers that "FOX ONE" is deeply in debt. Shun and his friends hope to win the "Xaxerion Championship" and the prize money in order to repay their debts. Shun returns to the world of online games, where he is confronted by Bakuretsu-kun, who used to play the game with him.

After her father passed away, a young woman inherited his production company, Miracle Entertainment, along with its most successful program, "Miracle Finder." In recent years, however, the show has fallen off the radar and it is now mostly forgotten. In an attempt to save the show from being canceled, this young woman desperately tries to look for a unique topic to use as inspiration. She finds it in the form of "Evol," a mysterious gene that has granted certain people special powers and is considered the next step in human evolution. But, as marvelous as this gene seems, its existence may lead to an unstoppable battle between humans for survival. However, as she becomes more entangled with the strange world of the "Evolvers," her life is suddenly disturbed by the arrival of four men: the cheerful idol Kira; the neuroscientist and Loveland University professor, Simon; the stoic CEO of Loveland Financial Group and Miracle Entertainment's benefactor, Zen; and her high school upperclassman Haku, a former delinquent now working as a police officer. As strange incidents begin to plague the city, will she be able to find out the truth about the "Evol" or "Black Swan," the organization behind numerous attacks from "Evolvers" and possibly connected to her father's death? What is her part to play in its plan, and how are the men around her connected to it all? [Written by MAL Rewrite]

When swords were outlawed in the eleventh year of the Meiji Era, the mighty samurai population began to dwindle. Those who rejected the ban on blades rebelled, causing violent unrest to erupt throughout the countryside. To combat the rise in criminal activity, an inescapable lake prison was constructed. Three young men, born of the Kumoh line, were given the duty of delivering criminals to their place of confinement—but could there be more to their mission than meets the eye? (Source: FUNimation)